BS1 29

Thanks for posting. You have either the S380 or the S385 Channel Balance. To determine which series you have, you'll need to confirm the length of the metal channel (only the metal).

You'll also need to get the measurement for the depth of your bottom shoe. If it does not match the measurements below, you'll need to let us know.

Comparison of the S378, S380 and S385 balance shoes.

Since your balance is stamped with only a 29, I can't use it to cross-reference the stamp you'd need.

You'll need to confirm the weight of the window and use the chart below the product description (once you've confirmed the series and length) to determine which option to choose.